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Formulating a rust preventative spray for hot axles during cooldown [Ohio]August 5, 2007 I have a process in which spindles on Steel Axles are cooled down with a water spray. I currently have a product that I add to the water that does an alright job. I have noticed that triethanolamine is the main ingredient in many rust inhibitors. Can I add 99% triethanolamine directly to water and create an RP rinse? I am looking for the most cost effective method to cool down the parts and not create rust? Brian Scott
August 8, 2007 Sodium nitrite (NaNO2) or potassium nitrite (KNO2) is less
expensive. More of a health hazard though, especially with spraying.
Triethanolamine is mostly a pH buffer and an inhibitor of acid
attack. Check your quenchant's MSDS; a minor ingredient such as a
nitrite or an azole may be the actual corrosion inhibitor.
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